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greenchild623

  • 4 years ago

need help with system: -14=-2=y-7x 2x=10y +4 PLEASE HELP!!!!

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  1. eashmore
    • 4 years ago
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    What do you need to do with the system?

  2. greenchild623
    • 4 years ago
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    solve for x and y

  3. eashmore
    • 4 years ago
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    Is the system\[\begin{matrix}-14 - 2 = y-7x \\ 2x = 10y + 4\end{matrix}\]

  4. eashmore
    • 4 years ago
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    Do you have to use any particular method?

  5. greenchild623
    • 4 years ago
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    sorry.... it is: -14=-20y-7x 10y +4 = 2x

  6. greenchild623
    • 4 years ago
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    solve by elimination....

  7. greenchild623
    • 4 years ago
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    (sigh...)

  8. eashmore
    • 4 years ago
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    Weird. I replied to this but my answer isn't showing up. Let me re-type it real fast.

  9. greenchild623
    • 4 years ago
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    'k

  10. eashmore
    • 4 years ago
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    First, we need to solve the first equation for x. We get\[x = -(20/7)y + 2\] Then we substitute this expression into the second equation. This yields \[10y - 2(-(20/7)y + 2) = -4\]Solve this for y and plug the value of y back into our expression for x. Let me know what you get.

  11. greenchild623
    • 4 years ago
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    x=34 y=?

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